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Leases (Schedule of Right-of-use Assets and Lease Liabilities) (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
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Leases [Abstract] |  |  |
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] |  | Other Noncurrent Assets | Right-of-use assets, finance lease
Right-of-use assets, finance lease |  | $ 211 | $ 220
Finance lease liabilities: |  |  |
Finance Lease, Liability, Current |  | Other Current Liabilities [Member] | Current lease liabilities, finance lease
Current lease liabilities, finance lease | [1] | $ 8 | $ 8
Finance Lease, Liability, Noncurrent |  | Other Long-Term Liabilities [Member] | Long-term lease liabilities, finance lease
Long-term lease liabilities, finance lease |  | $ 247 | $ 244
Finance Lease, Liability |  | us-gaap:OtherLiabilitiesMember | Total lease liabilities, finance lease
Total lease liabilities, finance lease |  | $ 255 | $ 252
Operating Lease, Right-of-Use Asset |  | Other Noncurrent Assets | Right-of-use assets, operating lease
Right-of-use assets, operating lease |  | $ 24 | $ 3
Operating lease liabilities: |  |  |
Operating Lease, Liability, Current |  | Other current liabilities | Other current liabilities
Current lease liabilities, operating lease | [1] | $ 18 | $ 1
Operating Lease, Liability, Noncurrent |  | Other long-term liabilities | Other long-term liabilities
Long-term lease liabilities, operating lease |  | $ 5 | $ 2
Operating Lease, Liability, Noncurrent |  | us-gaap:OtherLiabilities | us-gaap:OtherLiabilities
Total lease liabilities, operating lease |  | $ 23 | $ 3
Right-of-use assets |  | 235 | 223
Lease liabilities: |  |  |
Current lease liabilities | [1] | 26 | 9
Long-term lease liabilities |  | 252 | 246
Total lease liabilities |  | $ 278 | $ 255
[1] | Current lease liabilities are included in other current liabilities on the consolidated balance sheets.

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- Definition Present value of lessee's discounted obligation for lease payments from finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918701-209980 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977 + Details
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